KSM error

Hi,
we have Proxmox cluster with 4 hosts

proxmox-ve: 6.4-1 (running kernel: 5.4.128-1-pve)
pve-manager: 6.4-13 (running version: 6.4-13/9f411e79)
pve-kernel-5.4: 6.4-5
pve-kernel-helper: 6.4-5
pve-kernel-5.4.128-1-pve: 5.4.128-1
........................................
ksm-control-daemon: 1.3-1

On one host I got next error (and stopped KSM daemon) in ~1 min after start KSM Tuning Daemon:


● ksmtuned.service - Kernel Samepage Merging (KSM) Tuning Daemon...

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